* {
  margin: 0;
  padding: 0;
}
canvas {
  position: absolute;
  left: 0;
}

#textFireWorks {
  display: none;
}
#fireWorks{
  position:relative;
  z-index: 40;
}
.btn{
  position:relative;
  z-index: 100;
  background-color: #fff;
  border-radius: 5%;
  cursor: pointer;
}